Note 8 - Convertible Debt (PIK Notes) - Convertible Debt PIK Notes (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Nov. 03, 2014	Aug. 05, 2013
Less: Discount	$ (15,143,123)	$ (17,572,885)
PIK Note Derivative Liability	2,176,552	5,138,857	$ 10,035,625
Payment in Kind (PIK) Note [Member]
PIK Note Payable, Gross	38,196,966	34,645,771
Less: Discount	(15,143,123)	(17,572,885)
Less: Deferred Financing Cost	(13,750)	(21,250)
PIK Note Payable, Net	23,040,093	17,051,636
PIK Note Derivative Liability	2,176,552	5,138,857
Payment in Kind (PIK) Note [Member] | Series 2023 Notes [Member]
PIK Note Payable, Gross	14,071,008	12,762,816			$ 10,500,000
Less: Discount	(1,721,898)	(1,854,894)
Less: Deferred Financing Cost	(5,064)	(7,828)
PIK Note Payable, Net	12,344,046	10,900,094
PIK Note Derivative Liability	142,909	262,764
Payment in Kind (PIK) Note [Member] | Series A Notes [Member]
PIK Note Payable, Gross	24,125,958	21,882,955		$ 19,848,486
Less: Discount	(13,421,225)	(15,717,991)		$ (7,348,486)
Less: Deferred Financing Cost	(8,686)	(13,422)
PIK Note Payable, Net	10,696,047	6,151,542
PIK Note Derivative Liability	$ 2,033,643	$ 4,876,093